CN103399125B - A kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility and method - Google Patents
A kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility and method Download PDFInfo
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- CN103399125B CN103399125B CN201310325993.5A CN201310325993A CN103399125B CN 103399125 B CN103399125 B CN 103399125B CN 201310325993 A CN201310325993 A CN 201310325993A CN 103399125 B CN103399125 B CN 103399125B
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- 238000007789 sealing Methods 0.000 title claims abstract description 87
- 238000005553 drilling Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title description 14
- 238000007599 discharging Methods 0.000 title description 12
- 239000000523 sample Substances 0.000 claims abstract description 77
- 238000012544 monitoring process Methods 0.000 claims abstract description 61
- 239000003245 coal Substances 0.000 claims abstract description 58
- 239000003566 sealing material Substances 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 12
- 238000013508 migration Methods 0.000 claims description 8
- 230000005012 migration Effects 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 19
- 238000005086 pumping Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 26
- 238000004088 simulation Methods 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 15
- 238000003825 pressing Methods 0.000 description 14
- 238000007906 compression Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- -1 with comminutor Substances 0.000 description 1
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Abstract
本发明公开了一种瓦斯抽放钻孔封孔密封实验装置及方法，该装置包括装载煤样的箱体，箱体顶部放置有与箱壁形成密封结构的压板，通过压力加载模块和压板为箱体中的煤样加压，箱体沿长度方向的两个箱壁上分别设有打钻口和进气口，通过打钻口向煤样中打钻形成模拟抽放钻孔，一端封闭的瓦斯抽放管置于模拟抽放钻孔中，采用封孔材料并结合某种封孔工艺对模拟抽放钻孔进行密封，进气口安装有向煤样中充气的气体加载模块，打钻口安装有气体监测探头；本发明装置可在地面较开放的空间进行类似于井下实际抽放钻孔封孔密封实验，可以详细评估封孔材料及封孔工艺的封孔效果，且该装置成本低、实验方法操作简单，装置可供反复实验使用。
The invention discloses an experimental device and method for gas drainage, drilling, sealing and sealing. The device includes a box body for loading coal samples. A pressure plate forming a sealing structure with the box wall is placed on the top of the box body. The pressure loading module and the pressure plate are The coal sample in the box is pressurized, and the two walls of the box along the length direction are respectively provided with a drilling hole and an air inlet, through which drilling holes are drilled into the coal sample to form a simulated drainage hole, and one end is closed The gas drainage pipe is placed in the simulated drainage borehole, and the simulated drainage borehole is sealed with a sealing material combined with a certain sealing process. The gas inlet is installed with a gas loading module that inflates the coal sample. A gas monitoring probe is installed at the drill port; the device of the present invention can conduct a sealing experiment similar to the actual pumping and drilling of underground holes in a relatively open space on the ground, and can evaluate the sealing effect of the sealing material and the sealing process in detail, and the device The cost is low, the experimental method is simple to operate, and the device can be used for repeated experiments.
Description
Technical field
The present invention relates to gas discharge drilling sealing experiment field, particularly relate to a kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility and method.
Background technology
For high methane or projecting mine, the simple method of ventilating that adopts controls the gas density of workplace to be very difficult in allowed limits, gas drainage measure must be taked, namely by drilling, utilize boring (or tunnel), pipeline and vacuum pump that the gas in coal seam or goaf is evacuated to ground, effectively solve back production district gas density overrun issues.And gas drainage the key link joint is exactly firedamp taking-out discharging drilling sealing of hole, because different mining areas coal seam geological condition is different, the sealing material selected by extraction drilling and sealing and hole-sealing technology are not quite similar; Sealing material generally all needs to carry out sealing of hole test before selecting, and just applies after experiment meets the demands; The experiment of current detection sealing material sealing of hole performance is substantially all drilled test in the run of mine coal seam of down-hole, but be limited by the factors such as production, subsurface environment in down-hole, test is not easy to repeatedly carry out, and the true cause place not easily finding sealing of hole to lose efficacy, also cannot assess sealing quality quality in detail and determine reasonable sealed borehole length; Sealing material and the how crucial shutoff situation be crack around boring of hole-sealing technology sealing of hole effect, and existing surface drilling leakage test, it is not the sealing of hole experiment after drilling under real simulation well, just simple sealing one is similar to the pipeline of boring, with the coal body being formed with a large amount of crack after actual drilling hole distinguish larger, through the good sealing material of ground experiment effect of being everlasting, unsatisfactory for effect behind down-hole.At present a kind of device and method being specifically designed to extraction borehole sealing experiment under simulation well.
Summary of the invention
The object of the invention is the defect overcoming prior art, provides a kind of and is applicable to the new sealing material of inspection on ground and the firedamp taking-out discharging drilling sealing of hole sealing experimental facility of hole-sealing technology sealing of hole effect and method.
For achieving the above object, the present invention is by the following technical solutions:
A kind of firedamp taking-out discharging drilling sealing of hole sealing experimental facility, comprise the casing loading coal sample, casing top is placed with the pressing plate forming hermetically-sealed construction with tank wall, pressing plate is provided with pressure-loaded module, by the coal sample pressurization that pressure-loaded module and pressing plate are in casing, casing two tank walls are along its length respectively equipped with drill mouth and air intake opening, drilled in coal sample by mouth of drilling and form simulation extraction boring, the gas drainage pipe that one end is closed is placed in simulation extraction boring, adopt sealing material and in conjunction with certain hole-sealing technology, simulation extraction boring sealed, air intake opening is provided with and is tightly connected with this opening, the gas-loaded module of inflating in coal sample, drill on mouth and gas-monitoring probe is installed, described gas-monitoring probe is connected with gas detecting instrument.
Along simulation extraction boring bearing of trend in described casing coal sample, plurality of positions is separately installed with gas-monitoring probe, and each gas-monitoring probe is all connected with gas detecting instrument.
Described pressure-loaded module comprises the compression leg be connected with pressing plate, and compression leg is connected with pressure testing machine.
Described pressing plate bottom margin is provided with groove, is placed with O RunddichtringO in groove, makes to form hermetically-sealed construction between pressing plate and tank wall.
Described gas-loaded module comprises high-pressured air cylinder, and high-pressured air cylinder and air intake opening are tightly connected and inflate in coal sample, high-pressured air cylinder is provided with the pressure display unit detecting inner gas pressure.
The air pressure inflated in coal sample is 13 ~ 26kpa.
A kind of firedamp taking-out discharging drilling sealing of hole sealing experiment method, comprises the following steps:
(1) choosing experiment coal sample is put in experimental provision, and pressurizeed to coal sample by pressure-loaded module, the size of pressurization is determined according to mine terrestrial stress size and keeps pressure stability;
(2) utilize rig to drill mouth to coal sample molding plan extraction boring from tank wall, simulation extraction drilling depth is identical with casing length; Gas drainage pipe being placed in simulation extraction boring adopts sealing material to carry out shutoff sealing in crack around to simulation extraction boring and boring;
(3) gas-loaded module is utilized in coal sample, to be filled with high pressure gas-monitoring by casing air intake opening, inner gas pressure is kept to stablize, gas-monitoring probe is placed in casing to drill mouthful place being connected with gas detecting instrument, if gas-monitoring probe detects gas-monitoring, explanation sealing of hole lost efficacy, and needed improvement hole-sealing technology and sealing material again to test; If gas-monitoring probe does not detect gas-monitoring, illustrate that sealing of hole is respond well.
Be separately installed with gas-monitoring probe along simulation extraction boring bearing of trend, plurality of positions in described casing coal sample, each gas-monitoring probe is all connected with gas detecting instrument, is detected the migration circle of gas, determine sealing of hole segment length by each gas-monitoring probe.
In coal sample, inner gas pressure is 13 ~ 26kpa.
Described step adds bonding agent in coal sample, by tamping machine by coal sample uniform compaction, then is pressurizeed to coal sample by pressure-loaded module.
Compared with prior art, beneficial effect of the present invention is:
Firedamp taking-out discharging drilling sealing of hole sealing experimental facility of the present invention, the space that comparatively can open on ground carries out being similar to down-hole actual extraction drilling and sealing sealing experiment, gas-loaded module is adopted to be filled with gas-monitoring in coal sample by one end of holing from simulation extraction, detect whether there is gas-monitoring from the simulation extraction boring other end, the sealing of hole effect of sealing material and hole-sealing technology can be assessed in detail, and this installation cost is low, experimental technique is simple to operate, device can for repeatedly testing.
Further, gas-monitoring probe is separately installed with along simulation extraction boring bearing of trend plurality of positions in casing coal sample, the migration circle of gas is detected, for determining that down-hole gas sucking releasing sealing of hole determines that rational sealing of hole segment length provides experimental basis by each gas-monitoring probe.
Firedamp taking-out discharging drilling sealing of hole sealing experiment method of the present invention, by being formed with the firedamp taking-out discharging drilling in a large amount of crack after drilling under simulation well, similar to coal body borehole conditions after actual drilling, drilling situation under responsing well strictly according to the facts, gas drainage plugging experiment is carried out in conjunction with hole-sealing technology on ground by sealing material, to evaluate sealing material and hole-sealing technology sealing of hole effect, can repeated multiple times experiment to determine suitable sealing material and hole-sealing technology, do not affect normal production, various coal body drilling and sealing situation can be simulated, practical.
Accompanying drawing explanation
Fig. 1 is vertical view cutaway drawing of the present invention;
Fig. 2 is main TV structure figure of the present invention;
Fig. 3 is the process flow diagram of test method of the present invention;
In figure: 1-compression leg, 2-pressing plate, 3-high-pressured air cylinder, 4-gas monitoring instrument, 5-simulates extraction boring, 6-air intake opening, 7-monitors aperture, 8-tank wall, 9-casing, 10-drills mouth, 11-air chamber, and 12-gas-monitoring is popped one's head in, 13-coal sample, 14-sealing material, 15-O RunddichtringO, 16-gas drainage pipe, 17-sealing nut, 19-pressure display unit.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As depicted in figs. 1 and 2,1 is compression leg, and 2 is pressing plate, compression leg 1 is connected with pressing plate 2, and pressure testing machine is connected with compression leg 2, and pressure testing machine institute applied pressure passes to the coal sample in casing 9 by compression leg 1 and pressing plate 2, pressure testing machine is controlled by computing machine, realizes controlled loading.Be provided with groove at the edge of pressing plate 2, in groove, be placed with O RunddichtringO 15, guarantee pressing plate 2 and tank wall 8 close contact, reach sealing effectiveness; Firedamp taking-out discharging drilling module forms by simulating extraction boring 5, gas drainage pipe 16, coal sample 13 and sealing material 14, utilize rig by casing one side box wall drill mouth 10 to coal sample 13 drill formed simulation extraction boring 5, simulation extraction boring 5 adopts certain hole-sealing technology to seal by gas drainage pipe 16 and sealing material 14, with extraction drilling and sealing experiment actual under simulation well;
The gas-loaded module of this device is made up of the air intake opening 6 on tank wall, pressure display unit 19, high-pressured air cylinder 3, one section of space is left as air chamber 11 between simulation extraction boring 5 the inner and air intake opening 6, high-pressured air cylinder 3 inflates to air chamber 11 by air intake opening 6, air intake opening 6 is sealed by sealing nut 17, draft tube is equipped with pressure display unit 19, omnidistancely can show experimentation air chamber gas-monitoring force value, keep air chamber gas-monitoring force value to be 13 ~ 26kpa, high pressure gas-monitoring can along passage migration in crack in coal sample; Monitoring modular is made up of gas monitoring instrument 4, the monitoring aperture 7 be opened on tank wall, be placed in coal sample 13 neutralization along simulation extraction 5 bearing of trend multipath gas monitoring probes 12 of holing drill mouth 10 place by detecting aperture 7, monitoring aperture 7 is sealed by sealing nut 17, and whether the monitoring probe of diverse location can detect this place has gas-monitoring to exist; After simulation a period of time, the migration circle of gas-monitoring is judged by gas monitoring instrument, when mouth 10 place that drills detects gas-monitoring, illustrate that sealing material and hole-sealing technology sealing of hole lost efficacy, if mouth 10 place does not detect gas-monitoring drilling, illustrate that sealing of hole effect is better, the migration circle of the gas-monitoring detected of being popped one's head in by other position monitoring, can determine reasonable sealing of hole segment length.
As shown in Figure 3, a kind of firedamp taking-out discharging drilling sealing of hole sealing experiment method, specifically comprises the following steps:
(1) choose representational coal sample, with comminutor, coal sample is pulverized;
(2) device pressing plate 2 is removed, experiment coal sample is put into casing 9, coal sample is filled to and monitors aperture 7 when same level, wherein 5 monitoring probes of gas detecting instrument 4 are placed in coal sample 13 by monitoring aperture 7, wherein probe position of putting as shown in Figure 1, sealing is tightened by sealing nut 17 in monitoring aperture 7, and by tamping machine by coal sample uniform compaction, can add bonding agent if desired in coal;
(3) after coal sample installs compacting, build with pressing plate 2, apply pressure by pressure-loaded module to coal sample 13, the size of its pressurization is determined according to mine terrestrial stress size, and keeps pressure stability;
(4) coal sample was applied after pressure stability a period of time, utilize rig to intend extraction boring 5 from mouth 10 of drilling along device center line to coal sample 13 molding, simulate extraction 5 degree of depth of holing identical with casing 9 length;
(5) gas drainage pipe 16 utilizing one end airtight and sealing material 14, around carry out shutoff sealing in crack in conjunction with certain hole-sealing technology to simulation extraction boring 5 and boring, and one section of space is left as air chamber 11 in simulation extraction 5 the inners of holing;
(6) high-pressured air cylinder 3 is utilized, high pressure gas-monitoring is filled with to air chamber 11 by air intake opening 6, can show gas-monitoring pressure in air chamber by pressure display unit 19, keep gas-monitoring force value within the scope of 13 ~ 26kpa, air intake opening 6 tightens sealing by sealing nut 17;
(7) another gas-monitoring of gas detecting instrument 4 probe 12 is placed in mouth 10 place that drills, keep gas-monitoring pressure in air chamber 11 basicly stable, timing detects gas-monitoring migration circle by each monitoring probe of gas detecting instrument 4; If drill, mouth 10 place detects gas-monitoring, illustrates that sealing material and hole-sealing technology sealing of hole lost efficacy, needs improvement hole-sealing technology and sealing material again to test; If mouth 10 place does not detect gas-monitoring drilling, illustrate that sealing of hole effect is better, then the migration circle of the gas-monitoring detected by other monitoring probe, determine reasonable sealing of hole segment length.
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| CN103399125B true CN103399125B (en) | 2016-02-10 |
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| CN104977143B (en) * | 2015-07-24 | 2018-08-21 | 中国矿业大学(北京) | A kind of mash gas pumping drilling device for detecting sealability |
| CN105606773B (en) * | 2016-02-19 | 2017-08-01 | 龙岩学院 | A kind of performance testing device of sealing material for mine and its application method |
| CN106761572A (en) * | 2016-11-22 | 2017-05-31 | 西安科技大学 | A kind of Multi-functional analog boring test platform and its application method |
| CN107558990B (en) * | 2017-08-17 | 2020-06-26 | 重庆大学 | Testing device for high-gas soft coal drilling slag yield and drilling deformation |
| CN109030054B (en) * | 2018-08-17 | 2020-05-19 | 西安科技大学 | A simulation test device and method for directional drilling process in the coal seam |
| CN110686918B (en) * | 2019-11-21 | 2024-03-22 | 西南石油大学 | Simulation system and experimental method for stabilizing excavation surface of gas drainage control tunnel |
| CN111879477B (en) * | 2020-07-30 | 2022-07-19 | 陕西煤业化工技术研究院有限责任公司 | An inspection system and inspection method for the sealing effect of roadway spraying |
| CN115060318B (en) * | 2022-06-14 | 2024-12-13 | 重庆寅翔智能科技有限公司 | A multi-parameter measurement system for gas drainage pipes |
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Effective date of registration: 20220907 Address after: 714026 north side of South Street, new area, high tech Industrial Development Zone, Weinan City, Shaanxi Province Patentee after: Weinan Shaanxi coal Qichen Technology Co.,Ltd. Address before: 710077 Shaanxi Coal Industry Chemical Group Co., Ltd. No. 2 Jinye Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: SHAANXI COAL AND CHEMICAL TECHNOLOGY INSTITUTE Co.,Ltd. |